Obtuse Angle - Examples, Exercises and Solutions

Definition of Obtuse Angle

An obtuse angle is an angle that measures more than $90°$ degrees, but less than $180°$ degrees.

Acute angles can appear in triangles, parallelograms, and other geometric shapes.

Obtuse Angle

Detailed explanation

Practice Obtuse Angle

Question 1

True or false?

One of the angles in a rectangle may be an acute angle.

Question 2

If the two adjacent angles are not equal to each other, then one of them is obtuse and the other acute.

Question 3

Which figure depicts a right angle?

Question 4

Which of the following angles are obtuse?

Question 5

Choose the appropriate triangle according to the following:

Angle B equals 90 degrees.

examples with solutions for obtuse angle

Exercise #1

True or false?

One of the angles in a rectangle may be an acute angle.

Video Solution

Step-by-Step Solution

One of the properties of a rectangle is that all its angles are right angles.

Therefore, it is not possible for an angle to be acute, that is, less than 90 degrees.

Answer

False

Exercise #2

If the two adjacent angles are not equal to each other, then one of them is obtuse and the other acute.

Video Solution

Answer

True

Exercise #3

Which figure depicts a right angle?

Video Solution

Answer

Exercise #4

Which of the following angles are obtuse?

Video Solution

Answer

None of the options

Exercise #5

Choose the appropriate triangle according to the following:

Angle B equals 90 degrees.

Video Solution

Answer

Question 1

Which figure shows a right angle?

Question 2

Which of the following angles is obtuse?

Question 3

Which of the following angles is obtuse?

Question 4

Which of the following angles is a plane angle?

Question 5

Answer

91°

Exercise #4

Which of the following angles is a plane angle?

Video Solution

Answer

Exercise #5

Which of the angles is not an obtuse angle?